Environmental factors affecting numbers of pink-footed geese Anser brachyrhynchus utilising an autumn stopover site
For huntable waterbird species, the autumn migration strategy may be important for their fitness, as their behaviour and environmental factors may influence their exposure to hunting mortality. Hunting activity may also reduce the access to food resources which may be limited in the wintering areas,...
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Online Access: | https://pure.au.dk/portal/en/publications/37a8bd5c-2b73-4c43-b095-61f47bfa7d33 https://doi.org/10.2981/wlb.00161 |
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ftuniaarhuspubl:oai:pure.atira.dk:publications/37a8bd5c-2b73-4c43-b095-61f47bfa7d33 2024-02-11T09:55:39+01:00 Environmental factors affecting numbers of pink-footed geese Anser brachyrhynchus utilising an autumn stopover site Jensen, Gitte Høj Tombre, Ingunn M. Madsen, Jesper 2016 https://pure.au.dk/portal/en/publications/37a8bd5c-2b73-4c43-b095-61f47bfa7d33 https://doi.org/10.2981/wlb.00161 eng eng https://pure.au.dk/portal/en/publications/37a8bd5c-2b73-4c43-b095-61f47bfa7d33 info:eu-repo/semantics/restrictedAccess Jensen , G H , Tombre , I M & Madsen , J 2016 , ' Environmental factors affecting numbers of pink-footed geese Anser brachyrhynchus utilising an autumn stopover site ' , Wildlife Biology , vol. 22 , no. 5 , pp. 183-193 . https://doi.org/10.2981/wlb.00161 HABITAT UTILIZATION SNOW GEESE LAND-USE POPULATION SURVIVAL MIGRATION DISTURBANCE BIRDS ENERGETICS EXPANSION article 2016 ftuniaarhuspubl https://doi.org/10.2981/wlb.00161 2024-01-24T23:59:10Z For huntable waterbird species, the autumn migration strategy may be important for their fitness, as their behaviour and environmental factors may influence their exposure to hunting mortality. Hunting activity may also reduce the access to food resources which may be limited in the wintering areas, thereby affecting winter survival. In this study we assessed the possible influence of food resources, weather conditions, inter-specific competition and hunting intensity (as a measure of possible disturbance) on abundance and distribution of pink-footed geese Anser brachyrhynchus at their main autumn stopover site in Norway. The results show that food resources in term of spilt cereal grain were abundant, even by the time the geese had moved on. Snow cover did not limit the food availability during the main migratory period. Inter-specific competition with greylag geese Anser anser reduced food supplies locally and appeared to be increasing. Goose hunting intensity varied among sites and our data indicate a negative relationship between hunting intensity and the rate at which geese consumed the food resources. Collectively, our results suggest that the majority of pink-footed geese leave the stopover area earlier than they would otherwise, when hunting intensities are high. In the case of pink-footed geese, population consequences of disturbance is not a concern at present; however, an international species management plan calls for 1) keeping disturbance low in areas where geese do not cause conflicts with agriculture to prevent them being pushed to areas with problems, and 2) increased harvest to reduce and stabilise the population size. Both objectives can be met by reducing hunting disturbance in mid-Norway and it is recommended that a better local organisation of hunting is implemented. Article in Journal/Newspaper Anser brachyrhynchus Aarhus University: Research Norway Wildlife Biology 22 5 183 193 |
institution |
Open Polar |
collection |
Aarhus University: Research |
op_collection_id |
ftuniaarhuspubl |
language |
English |
topic |
HABITAT UTILIZATION SNOW GEESE LAND-USE POPULATION SURVIVAL MIGRATION DISTURBANCE BIRDS ENERGETICS EXPANSION |
spellingShingle |
HABITAT UTILIZATION SNOW GEESE LAND-USE POPULATION SURVIVAL MIGRATION DISTURBANCE BIRDS ENERGETICS EXPANSION Jensen, Gitte Høj Tombre, Ingunn M. Madsen, Jesper Environmental factors affecting numbers of pink-footed geese Anser brachyrhynchus utilising an autumn stopover site |
topic_facet |
HABITAT UTILIZATION SNOW GEESE LAND-USE POPULATION SURVIVAL MIGRATION DISTURBANCE BIRDS ENERGETICS EXPANSION |
description |
For huntable waterbird species, the autumn migration strategy may be important for their fitness, as their behaviour and environmental factors may influence their exposure to hunting mortality. Hunting activity may also reduce the access to food resources which may be limited in the wintering areas, thereby affecting winter survival. In this study we assessed the possible influence of food resources, weather conditions, inter-specific competition and hunting intensity (as a measure of possible disturbance) on abundance and distribution of pink-footed geese Anser brachyrhynchus at their main autumn stopover site in Norway. The results show that food resources in term of spilt cereal grain were abundant, even by the time the geese had moved on. Snow cover did not limit the food availability during the main migratory period. Inter-specific competition with greylag geese Anser anser reduced food supplies locally and appeared to be increasing. Goose hunting intensity varied among sites and our data indicate a negative relationship between hunting intensity and the rate at which geese consumed the food resources. Collectively, our results suggest that the majority of pink-footed geese leave the stopover area earlier than they would otherwise, when hunting intensities are high. In the case of pink-footed geese, population consequences of disturbance is not a concern at present; however, an international species management plan calls for 1) keeping disturbance low in areas where geese do not cause conflicts with agriculture to prevent them being pushed to areas with problems, and 2) increased harvest to reduce and stabilise the population size. Both objectives can be met by reducing hunting disturbance in mid-Norway and it is recommended that a better local organisation of hunting is implemented. |
format |
Article in Journal/Newspaper |
author |
Jensen, Gitte Høj Tombre, Ingunn M. Madsen, Jesper |
author_facet |
Jensen, Gitte Høj Tombre, Ingunn M. Madsen, Jesper |
author_sort |
Jensen, Gitte Høj |
title |
Environmental factors affecting numbers of pink-footed geese Anser brachyrhynchus utilising an autumn stopover site |
title_short |
Environmental factors affecting numbers of pink-footed geese Anser brachyrhynchus utilising an autumn stopover site |
title_full |
Environmental factors affecting numbers of pink-footed geese Anser brachyrhynchus utilising an autumn stopover site |
title_fullStr |
Environmental factors affecting numbers of pink-footed geese Anser brachyrhynchus utilising an autumn stopover site |
title_full_unstemmed |
Environmental factors affecting numbers of pink-footed geese Anser brachyrhynchus utilising an autumn stopover site |
title_sort |
environmental factors affecting numbers of pink-footed geese anser brachyrhynchus utilising an autumn stopover site |
publishDate |
2016 |
url |
https://pure.au.dk/portal/en/publications/37a8bd5c-2b73-4c43-b095-61f47bfa7d33 https://doi.org/10.2981/wlb.00161 |
geographic |
Norway |
geographic_facet |
Norway |
genre |
Anser brachyrhynchus |
genre_facet |
Anser brachyrhynchus |
op_source |
Jensen , G H , Tombre , I M & Madsen , J 2016 , ' Environmental factors affecting numbers of pink-footed geese Anser brachyrhynchus utilising an autumn stopover site ' , Wildlife Biology , vol. 22 , no. 5 , pp. 183-193 . https://doi.org/10.2981/wlb.00161 |
op_relation |
https://pure.au.dk/portal/en/publications/37a8bd5c-2b73-4c43-b095-61f47bfa7d33 |
op_rights |
info:eu-repo/semantics/restrictedAccess |
op_doi |
https://doi.org/10.2981/wlb.00161 |
container_title |
Wildlife Biology |
container_volume |
22 |
container_issue |
5 |
container_start_page |
183 |
op_container_end_page |
193 |
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1790598135089725440 |